JPH07147647A - Monitor camera device - Google Patents

Abstract

PURPOSE:To provide a monitor camera device which contains a TV camera part, an illumination part and a hot-wire sensor and can facilitate its angle adjustment. CONSTITUTION:An attachment member 23 is connected to a base part 20 via a ball joint 25. The part 20 stores the circuit boards 34 and 35. A light emitting element 30, a solid state image pickup element 31 containing a lens system 32, and a pyroelectric element 33 constructing a hot-wire sensor are fixedly placed on the board 34. A cover 21 is made of acrylic resin, polycarbonate resin, etc., and attached to the part 20. Then the cover 21 covers both elements 30 and 31 and also includes a window part 22 at the part which covers the element 33. The part 22 uses such materials like polyethylene of high density, etc., that transmits the far infrared ray and also the part 22 contains a Fresnel lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera device, and more particularly to a surveillance camera device in which an illumination unit, a television camera unit and a heat ray sensor unit are integrated.

[0002]

2. Description of the Related Art Conventionally, a television camera (hereinafter referred to as a TV camera) portion and a heat ray sensor portion are provided, and when a heat ray sensor portion issues a warning, that is, a signal indicating that an intruder exists is output from the heat ray sensor portion. In this case, there is known a surveillance camera device that activates the TV camera unit to capture an image of an intruder.
In No. 55, a surveillance camera device was proposed in which an illumination unit was further provided to the above-mentioned surveillance camera device, and an intruder could be captured well even at night.

FIG. 7 shows its configuration. In the figure, 1 is a TV camera unit, 2 is an image pickup unit, 3 is a video signal processing unit, 4 is a reflecting mirror, 5 is a pyroelectric element, 6 is a signal processing unit, 7 is a light, 8 is a power source, and 9 is illuminance detection. Parts 10, 11, 12 are switches,
Reference numeral 13 indicates a housing.

The TV camera section 1 is provided with an image pickup section 2 composed of a solid-state image pickup element such as a CCD image pickup element, and a video signal processing section 3, and is always operating. The video signal processing unit 3 includes the image pickup unit 1
It adds a synchronization signal to the video signal output from the device, and performs a predetermined process such as amplification for sending.

The reflector 4, the pyroelectric element 5, and the signal processing section 6 constitute a heat ray sensor. The pyroelectric element 5 is arranged at the focal point of the reflecting mirror 5, and its output is subjected to predetermined processing such as amplification by the signal processing unit 6 and comparison with a reference signal. When the signal processing unit 6 detects a moving body that emits heat rays, the signal processing unit 6 issues an alarm and outputs an alarm signal indicating that an intruder is present to a predetermined device (not shown) such as a receiver. Since the signal processing in the heat ray sensor is well known, its details are omitted.

The video signal from the video signal processing unit 3 is input to the switch 10 and the illuminance detection unit 9. The switch 10 is normally open as shown in the figure, and is closed when an alarm signal is output from the signal processing unit 6. Therefore, TV
Although the camera unit 1 is always operating, it is sent to a predetermined device such as a receiver only when the heat ray sensor issues an alarm.

The illuminance detector 9 takes in a video signal and detects the average illuminance in the visual field. Specifically, for example, a video signal of a scanning line at a predetermined position is captured, an average luminance level of the captured video signal is obtained for each field or frame, and the average luminance level is compared with a predetermined reference level. This reference level is preferably set to a level corresponding to the minimum subject illuminance of the image pickup unit 2. Then, when the average brightness level is equal to or lower than the reference level, a high level is output.

The output of the illuminance detector 9 is supplied to the switch 12. The switch 12 is in a closed state when the output of the illuminance detecting section 9 is at a high level, and is in an open state when the output is at a low level. Further, the output of the signal processing unit 6 is supplied to the switch 11, and the switch 11 is closed for a predetermined time when an alarm signal is output, and is opened for no alarm signal. Become.

Therefore, when the heat ray sensor is issued, the switch 11 is always closed for a certain period of time, but when the illuminance during daytime exceeds a predetermined value, the switch 12 is not closed so that the light 7 is activated. Does not illuminate, and when the illuminance at night is below a predetermined value, the switch 12 is closed and the light 7 is illuminated.

By performing the above operation, when there is an intruder when the illuminance is equal to or lower than the minimum subject sensitivity of the image pickup unit 2 such as at night, the light 7 is turned on for a certain period of time. Good images will be sent.

Of course, the light 7 may be one that emits visible light, but since the solid-state image pickup device used in the image pickup section 2 has sensitivity in the near infrared region as well,
It may be one that emits near infrared rays.

[0012]

By the way, in the surveillance camera apparatus shown in FIG. 7, it is necessary to adjust the visual fields of the image pickup section 2, the reflecting mirror 4 and the light 7, respectively.
That is, since the light 7 illuminates the subject, its field of view must be within the field of view of the imaging unit 2, and the detection area of the pyroelectric element 5 is substantially the same as the field of view of the TV camera 1. It is desirable to be set as follows. Because
This is because it becomes unnecessary to photograph an extra area.

Therefore, the image pickup section 2, the reflecting mirror 4 and the light 7 are provided.
It is conceivable to provide an angle adjustment mechanism for adjusting each field of view, but it would be troublesome to adjust the field of view independently of each other in this way, and each field of view would be desired after adjustment of the field of view. It also takes time to adjust the field of view because it is necessary to confirm whether or not the position is.

An object of the present invention is to solve the above problems and to provide a surveillance camera device capable of easily adjusting the field of view.

[0015]

In order to achieve the above object, a surveillance camera apparatus of the present invention detects a light emitting element for illuminating an object, a solid-state image pickup element, and a moving object radiating far infrared rays. In a surveillance camera device including a pyroelectric element for performing, a light emitting element, a solid-state imaging element, and a pyroelectric element are both fixed to a circuit board arranged in a base portion,
In addition, the base portion is connected to the mounting member via a joint whose angle can be adjusted.

[0016]

FUNCTION AND EFFECT OF THE INVENTION The light emitting device, the solid-state image pickup device, and the pyroelectric device are all fixed to the base portion. Here, it is a matter of course that the respective fields of view of the light emitting element, the solid-state imaging element, and the pyroelectric element are attached so as to maintain a desired relationship with each other. Then, the base portion is attached to the ceiling or the wall surface via the attachment member, but the base portion and the attachment member are connected via a joint whose angle can be adjusted.

Therefore, in the surveillance camera apparatus of the present invention, the angle of view of the light emitting element, the solid-state image pickup element, and the pyroelectric element can be directed in a desired direction only by adjusting the angle of the base portion, so that the angle adjustment work can be performed. Can be done very easily.

[0018]

Embodiments will be described below with reference to the drawings.
1 is a perspective view showing a configuration of a first embodiment of a surveillance camera device according to the present invention, FIG. 2 is a top view thereof, and FIG.
2 is a cross-sectional view taken along the line AA ′ in FIG. 2, in which 20 is a base portion, 21 is a cover, 22 is a window portion, 23 is a mounting member, 24 is a screw, 25 is a ball joint, 30 is a light emitting element, Reference numeral 31 is a solid-state image sensor, 32 is a lens system, 33 is a pyroelectric element, and 34 and 35 are circuit boards.

The mounting member 23 is for mounting the surveillance camera device at a desired position such as a ceiling or a wall surface, and the mounting member 23 and the base portion 20 are connected by a ball joint 25. Therefore, the angle of the base portion 20 with respect to the mounting member 23 can be adjusted in a desired direction. Also, the ball joint 25
The mounting member 23 and the mounting member 23 are fixed by screws 24.

As shown in FIG. 3, circuit boards 34 and 35 are housed in the base portion 20. The outer circuit board 34 has a light emitting element 3 for illuminating a subject.
0, a solid-state image sensor 31 having a lens system 32 mounted thereon, and a pyroelectric element 33 constituting a heat ray sensor are fixedly arranged. The circuit configured by the circuit boards 34 and 35 may be the same as that shown in FIG. 7, or may have another configuration. That is, for example, in FIG. 7, the lamp is turned on when the illuminance is less than or equal to the threshold value.
The light emitting element 30 may be always turned on when the heat ray sensor unit including 3 issues a warning.

Although three light emitting elements 30 are arranged in FIG. 3, any number of light emitting elements 30 may be arranged. The light emitting element 30 may emit visible light or may emit near infrared light. Because the solid-state image sensor 3
This is because 1 has sensitivity in the near infrared to visible light region. In particular, when the light emitting element 30 that emits near infrared rays is used, the cover 21 can be colored in black or the like, so that it is difficult to see the inside of the cover 21 from the outside.

The cover 21 is made of acrylic resin, polycarbonate resin or the like, and is fixedly or detachably attached to the base portion 20. And the cover 21 is
The light emitting element 30 and the solid-state imaging element 31 are covered, but the window portion 22 is provided in the portion covering the pyroelectric element 33. The window portion 22 is formed of a material that transmits far infrared rays, such as high density polyethylene. Thus, the pyroelectric element 3
The different materials are used for the portion covering 3 and the portion covering the light emitting element 30 and the solid-state image pickup element 31 because the regions of the light to be transmitted are different. That is, the window portion 22 needs to be a material that transmits far infrared rays, while the light emitting element 3
0 and the portion covering the solid-state image pickup device 31 need to transmit light in the region from visible light to near infrared.

A Fresnel lens is formed in the window portion 22, and the detection area of the pyroelectric element 33 is determined by the optical characteristics of the Fresnel lens and the attachment state of the pyroelectric element 33.

With the above arrangement, the field of view of the solid-state image sensor 31 is determined by the mounting angle of the solid-state image sensor 31 on the circuit board 34 and the optical characteristics of the lens system 32.
Further, the field of view of the light emitting element 30 can be determined by the attachment angle to the circuit board 34 or the like.

Therefore, if the warning distance is set, the mounting state of the light emitting element 30 and the solid-state image pickup element 31 are correspondingly set.
And the optical characteristics of the lens system 32 can be determined. Further, the attachment status of the pyroelectric element 33 and the optical characteristics of the Fresnel lens formed in the window portion 22 can be determined, so that the light emitting element can be determined. The mutual relationship among the visual field of 30, the visual field of the solid-state image sensor 31, and the detection area of the pyroelectric element 33 can be set as desired.

As described above, in the surveillance camera apparatus of the present invention, the mutual relationship among the visual field of the light emitting element 30, the visual field of the solid-state image pickup element 31, and the detection area of the pyroelectric element 33 is fixed. However, since it is possible to adjust the angle of the base portion 20, by adjusting the angle of the base portion 20, the field of view of the light emitting element 30 and the solid-state imaging element 31 can be adjusted.
The field of view and the detection area of the pyroelectric element 33 can be oriented in a desired direction.

In FIG. 3, the space in which the light emitting element 30 is arranged and the space in which the solid-state image pickup element 31 is arranged are partitioned by a partition wall 40.
This is to prevent the light emitted from 0 from being reflected on the inner surface of the cover 21 and entering the solid-state imaging device 31. Also,
The space in which the solid-state imaging device 31 is arranged and the space in which the pyroelectric device 33 is arranged are partitioned by a partition wall 41.
This is also to prevent mutual interference.

The first embodiment of the present invention has been described above. Next, the second embodiment will be described with reference to FIGS. 4, 5 and 6. The same components as those in the first embodiment described above in FIGS. 4, 5, and 6 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 4 is a perspective view showing the structure of the second embodiment of the present invention, FIG. 5 is a top view thereof, and FIG. 6 is a sectional view taken along the line AA 'in FIG. The second embodiment is the first one in that a lens system is not mounted on the solid-state image pickup device 31 and that a window 50 having a Fresnel lens is provided in a portion covering the solid-state image pickup device 31. Is different from the embodiment described above. That is, the window system 50 of the Fresnel lens is provided by omitting the lens system 32 in the first embodiment. The material of the window 50 may be the same as the material of the cover 21 as in the first embodiment.

As a result, according to the second embodiment, the same effect as that of the first embodiment is obtained, and the cost is lower than that of the case where the lens system 32 is provided as in the first embodiment. It has an effect that it can be configured. Note that FIG.
When the Fresnel lens is used as shown in FIG. 3, the image formed on the solid-state image sensor 31 is blurred due to the lens performance, as compared with the case where the lens system 32 is used as in the first embodiment. Although it becomes easier, it is sufficient for the surveillance camera device to have a resolution that allows the shape of the human body to be discriminated, and it has been actually confirmed that a Fresnel lens can also satisfy such a requirement.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications can be made. In particular, the shape and internal structure of the surveillance camera device are not limited to those in the above-described embodiments.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a first embodiment of a surveillance camera device according to the present invention.

FIG. 2 is a top view of the surveillance camera device shown in FIG.

3 is a cross-sectional view taken along the line AA ′ in FIG.

FIG. 4 is a perspective view showing the configuration of a second embodiment of the surveillance camera device according to the present invention.

5 is a top view of the surveillance camera device shown in FIG. 4. FIG.

6 is a cross-sectional view taken along the line AA ′ in FIG.

FIG. 7 is a diagram showing the configuration of a surveillance camera device proposed by the applicant in Japanese Patent Application No. 5-11055.

[Explanation of symbols]

20 ... Base part, 21 ... Cover, 22 ... Window part, 23 ... Attachment member, 24 ... Screw, 25 ... Ball joint, 3
0 ... Light-emitting element, 31 ... Solid-state image sensor, 32 ... Lens system,
33 ... Pyroelectric element, 34, 35 ... Circuit board.

Claims (4)

[Claims] 1. A surveillance camera apparatus comprising a light-emitting element for illuminating a subject, a solid-state imaging element, and a pyroelectric element for detecting a moving object radiating far infrared rays, the light-emitting element, the solid-state imaging element, A surveillance camera device, wherein both the pyroelectric element is fixed to a circuit board arranged on a base portion, and the base portion is connected to a mounting member via a joint whose angle can be adjusted. 2. A member for covering the light emitting element, the solid-state image sensor, and the pyroelectric element is attached to the base portion, and the cover covers the light emitting element and is a member that transmits visible light or near infrared light. The part covering the solid-state image sensor is made of a member that transmits visible light or near infrared light, and the part covering the pyroelectric element is made of a member that transmits far infrared light. The surveillance camera device according to claim 1. 3. The surveillance camera apparatus according to claim 2, wherein a Fresnel lens is formed on a portion of the cover which covers the pyroelectric element. 4. The surveillance camera device according to claim 2, wherein a Fresnel lens is formed in a portion of the cover which covers the solid-state image pickup element.